import utils from '../assets/js/utils';
const ORIGINAL_THEME = '5995D8';
export default {
  mixins: [utils],

  created() {},

  methods: {
    // 获取系统LOGO图片名称设置以及主题信息
    getLogoObj() {
      let _this = this;
      let value = window.sessionStorage.getItem('_carrierId');
      if (value === 'null' || !value) {
        return;
      }

      let params = {
        carrierId: value
      };

      API.fetchGet('/skin/config.do', params).then(
        function(res) {
          var data = res.data;
          let skinTheme = data.skinTheme;
          let _skinType = _this.getChangedDemical(skinTheme, 10, 16);
          if (Number(_skinType) !== 0 && ORIGINAL_THEME !== _skinType) {
            _this.setSkinType(_skinType);
            _this.watchTheme(_skinType, ORIGINAL_THEME);
          } else {
            _this.setSkinType(ORIGINAL_THEME);
          }

          window.sessionStorage.setItem('_LogoObj', JSON.stringify(data));
          _this.setLogoObj(data);
        },
        err => {}
      );
    },

    updateStyle(style, oldCluster, newCluster) {
      let newStyle = style;
      oldCluster.forEach((color, index) => {
        newStyle = newStyle.replace(new RegExp(color, 'ig'), newCluster[index]);
      });
      return newStyle;
    },
    getCSSString(url, callback, variable) {
      const xhr = new XMLHttpRequest();
      xhr.onreadystatechange = () => {
        if (xhr.readyState === 4 && xhr.status === 200) {
          this[variable] = xhr.responseText.replace(/@font-face{[^}]+}/, '');
          callback();
        }
      };
      xhr.open('GET', url);
      xhr.send();
    },
    getThemeCluster(theme) {
      const tintColor = (color, tint) => {
        let red = parseInt(color.slice(0, 2), 16);
        let green = parseInt(color.slice(2, 4), 16);
        let blue = parseInt(color.slice(4, 6), 16);
        if (tint === 0) {
          // when primary color is in its rgb space
          return [red, green, blue].join(',');
        } else {
          red += Math.round(tint * (255 - red));
          green += Math.round(tint * (255 - green));
          blue += Math.round(tint * (255 - blue));
          red = red.toString(16);
          green = green.toString(16);
          blue = blue.toString(16);
          return `#${red}${green}${blue}`;
        }
      };
      const shadeColor = (color, shade) => {
        let red = parseInt(color.slice(0, 2), 16);
        let green = parseInt(color.slice(2, 4), 16);
        let blue = parseInt(color.slice(4, 6), 16);
        red = Math.round((1 - shade) * red);
        green = Math.round((1 - shade) * green);
        blue = Math.round((1 - shade) * blue);
        red = red.toString(16);
        green = green.toString(16);
        blue = blue.toString(16);
        return `#${red}${green}${blue}`;
      };
      const clusters = [theme];
      for (let i = 0; i <= 9; i++) {
        clusters.push(tintColor(theme, Number((i / 10).toFixed(2))));
      }
      clusters.push(shadeColor(theme, 0.1));
      return clusters;
    },

    watchTheme(val, oldVal) {
      if (typeof val !== 'string') return;
      const themeCluster = this.getThemeCluster(val.replace('#', ''));
      const originalCluster = this.getThemeCluster(oldVal.replace('#', ''));
      const getHandler = (variable, id) => {
        return () => {
          const originalCluster = this.getThemeCluster(ORIGINAL_THEME.replace('#', ''));
          let newStyle = this.updateStyle(this[variable], originalCluster, themeCluster);
          let styleTag = document.getElementById(id);
          if (!styleTag) {
            styleTag = document.createElement('style');
            styleTag.setAttribute('id', id);
            document.head.appendChild(styleTag);
          }
          styleTag.innerText = newStyle;
        };
      };
      const chalkHandler = getHandler('chalk', 'chalk-style');
      const docsHandler = getHandler('docs', 'docs-style');
      if (!this.chalk) {
        // const url = `https://unpkg.com/element-ui@${this.version}/lib/theme-chalk/index.css`;
        // const url = 'static/theme/index.css';
        // this.getCSSString(url, chalkHandler, 'chalk');
      } else {
        chalkHandler();
      }
      if (!this.docs) {
        const links = [].filter.call(document.querySelectorAll('link'), link => {
          return /docs\..+\.css/.test(link.href || '');
        });
        links[0] && this.getCSSString(links[0].href, docsHandler, 'docs');
      } else {
        docsHandler();
      }
      const styles = [].slice.call(document.querySelectorAll('style')).filter(style => {
        const text = style.innerText;
        return new RegExp(oldVal, 'i').test(text) && !/Chalk Variables/.test(text);
      });
      styles.forEach(style => {
        const { innerText } = style;
        if (typeof innerText !== 'string') return;
        style.innerText = this.updateStyle(innerText, originalCluster, themeCluster);
      });
    }
  }
};
